jackson



(No Model.)

T. A. JACKSON.

MACHINE FOR SAWING STONE.

2 Sheets-Sheet l I Panama Apr. 12, 1887.

N. PETERS, Phcloblhographar. Washington. D. C,

' mic-w. '1, Mord,

UNITED STATES PATENT OFFICE.

THADDEUS A. JACKSON, OF NEV YORK, N. Y.

MACHINE FOR SA W|NG STONE.

SPECIFICATION forming part of Letters Patent No. 361,011, dated April12, 1887.

Application filed November 27, 1886. Serial No. 220,043. (No model.)

To aZl whom it may concern..-

Be it known that I, THADDEUS A. JACKSON, a citizen of the United States,residing at New York, in the county of New York and State of New York,have invented certain new and useful Improvements in Machines for.Sawing Stone 5 and I do hereby declare that the following 1s a full,clear, and exact description of the same, reference being had to theannexed drawings, making a part of this specification, and to theletters and figures of reference marked thereon.

Figure l of the drawings is a side elevation of my improved machine forsawing stone and driving mechanism for imparting to the sawblade therequired reciprocating motion; Fig. 2, a top plan view of the same; Fig.3, an

end view; Fig. 4, a detail View in perspective of the saw-blade carrier,also the feednut detached from the carrier; Fig. 5, a detail view inperspective of the slotted plate employed with other .mechanism forlifting the saw-blade and carrier at each end of the stroke; Fig. 6,adetail view, in perspective, showing a modification of the carrier; and

Fig. 7, a detail view in perspective of the mechanism employed inconnection with the slotted plate for feeding the saw-blade in adownward direction when cutting both ways.

The present invention has relation to that class of stone-sawingmachines in whichthe saw-blade is raised by suitable mechanism at theend of the stroke and lowered at the be-.

ginning of the next stroke, whereby the kerf can be cleared of debriswhile the saw-blade is in operation.

The object of the invention is to provid simple and effective meansforraising and lowering the saw-blade at the end of the stroke; also,improving the machine in the several details of construction, whereby amore perfect action of the saw-blade is obtained and the motion thereofmore readily controlled. These several objects above enumerated I attainby the construction substantially as shown in the drawings, andhereinafter described and claimed.

In the accompanying drawings, A represents the frame of the machine ofany desirable form and construction, and is provided, near one end,withthe usual pulleys, abB,over and around which pass driving-belts ed. The

arrangement of the pulleys and belts is of the common form, andtherefore I layno claim thereto, and, if preferred, any suitable orwellknown driving mechanism may be employed,

Within the frame A is supported the sashes O, by means of the rollers e,working on short tracks f, secured to the inner sides of the frame ofthe machine. Below the tracks], at asuitable distance therefrom, areguides g, to

guide the sashes in their reciprocating mo-' tion. If preferred, thelower ends of the sashes, and also the top, may be connected together bysuitable braces, h i, respectively, as

shown in Figs. 1 and 2. Any suitable means,

however,may be employed for connecting the sashes together, as foundmost preferable.

The saw-blade D may be of any suitable construction usually employed forsawing stone, either a plain cutting-edge or diamond saw-teeth beingused, as desired. of this saw-blade are connected to carriers E, of theconstruction shown in either Figs. 4 or 6, the same having rollers jupon their sides, which bear upon upright guides it, upon the innersides of the sashes C. The carrier, as shown in Fig. 4., at its back endis cast with transverse bars Z, through which pass the screw-threadedends of the usual saw-buckles, m, and receive upon their screwthreadedends the usual tightening-nuts, the opposite ends of said buckles beingattached in the ordinary manner to the saw-blade. These buckles are ofthe usual construction, and are for the purpose of tightening thesaw-blade, said blade at its extremities passing between lugs it uponthe interior top and bottom of the carrier, as

shown.

The carrier E is cast with an opening, 0, of any preferred shape tocorrespond with the shape of the sectional nut F, said not having Theends wings p, which fit in lateral grooves q of the opening o,for thepurpose of retaining the nut in a more steady position. I have shownthis not on an enlarged scale and square in crosssection, and thereforeit should be understood that it is not of natural size or shape comparedinvention. The feed-screws G pass loosely through holes r in thecarriers and engage with screw-threaded holes 3 of the nuts F, wherebythe carriers are moved up and down.

In Fig. 6, which is a modification of the saw-blade carrier, in place ofthe lugs a transverse plates H are employed, having notches t, in whichpasses the extremity of the sawblade. These plates are made verticallyadj ustable, also horizontally adjustable, by means of slots andset-screws, or in any other wellknown and preferred manner, therebyenabling the saw-blade to be kept in a true vertical line by theadjustment of the plates, and also adapting the carriers to saws ofdifferent widths. The lugs a, as well as the notches t, are for thepurpose of stcadyingthc saw-blade while in motion.

The upper ends of the feedscrews G are provided with gear-wheels I, withwhich engage the teeth of pinions It, said pinion terminating at itsupper end in a beveled gearwheel, 22. These pinions are mounted uponsuitable studs projecting upwardly from a central brace, it, secured tothe upper ends of the sashes O, as shown more clearly in Fig. 2. Thegear-wheels o engage with similar gearwheels, 0:, upon the ends of ahorizontal shaft, a, which has its bearings in the central brace betweenthe sashes. The inner extremity is formed square or flat sided, as shownat I), and passes through a similarly formed sleeve, 0, upon the end ofwhich is rigidly connected to or formed with a beveled gear-wheel, K,with which engage gear-wheels dc, upon the inner ends of transverseshaftsf g.

The crank-shaft h of the belt or driving pulleyBis connected to theshaft f by means of pitman i, ratchet-wheelj, and'pawl k. The shaft 9 isprovided upon its outer end with the pulley a, hercinbeforedescribed,and also with two loose pulleys. (Shown in dotted lines,Fi g.1.) The drivingshaft or crank-shaft]! is provided with a crank, Z, towhich is attached the pitman L, said pitman in turn being connected inany suitable manner to the sashes O. The shaft h is also provided with asecond crank, m, to which is connected a pitman, M, the opposite end ofsaid pitman being connected in any suitable manner to alongitudinally-sliding block, N, said block having a horizontal slot, n,with which engages a crankpin, 0, 011 the crank-wheel 0.

To the crank-wheel O are connected the ends of rods 1? Q, the oppositeends thereof being attached in any preferred manner to arms 1), upon ascrew-sleeve, Ronc upon each of the feed-screws G. The screw-sleeves Rextend over the smooth portion of the feed-screws G, at the upper endstheredfiand move independent of said feed-screws, and around the sleevesare nuts or boxes S, as shown in Fig. 3, which engage with the threadsthereof. Suitable nuts are employed to keep the sleeves R in position onthe feed-screw. The block N slides between incline-faced guides T U,whereby the block N is given a downward motion as it is the stoneaftcrit has been cut.

projecting forward in a longitudinal direction and brings or carries thecrank-wheel 0 partially around.

In the operation of the machine motion is imparted to the saw-blade D bymeans of the driving-pulley B, belt d, and pitman-connection L with thesashes C, carrying the sashes and saw-blade forward to cut the stone. Atthe completion of the stroke the crankandpitman connection M m with theblock N move the block forward, and by means of the pin 0' theorank-wheel Owill be turned, and through the medium of the rods P Qandarms p the screw-sleeves It will be turned, and thereby lift thefeed-screws G with it, and in turn the feed-screws lift the carriers Eand saw'blade I) while the latter is coming back. "When the saw iscutting the stone, the blade is fed downwardly by means of the shaft fand gear-wheel d, engaging with the gearwhecl K, turning the shaft a,and by means of the gear-wheels 17 thereon engaging with the gear-wheelsv, and the pinions u, engaging with the gear-wheels I, the feed'screws Gare turned in the proper direction to lower the carriers E and feed thesaw-blade, as required while cutting the stone. By means of theshaftg",the belts and tight and loose pulleys,hcreinbefore described, and thegear -wheels 6' K, with the gearing above described for feeding thesaw-blade, said blade may be raised or lowered while the saw is not inmotion, to adjust the blade to the varying heights of the stone to besawed,and to raise the blade out of understood that the manner ofconnecting the gearqvheel K to the shalt a, as hereinbefore described,admits of the shaft moving longitudinally in the sleeve 0 of said wheelwith out interfering therewith; but when turned the shaft will turn withit. \Vhen it is desired to have the saw out both ways when moving bothbackward and forward,the block N, guides T U, and thecrank-and-pitmanconnection M m are dispensed with and aslotted plate, \V, substituted,said plate being made stationary on the frame of the machine in anywell-known manner. This plate VVhas an inclined slot, 1', whichterminates at its end in inclined extremities s, the crank-pin 0 of thecrank-whcel O engaging with the slot 1". The inclination of the slotwill cause the crankwheel to turn downward at each end of the strokewhen thcsashcs are moved forward and backward.

In order to feed at each end of the stroke, the crank at the extremityof the shaft h is removed and the cam A substituted, and a bracket, '1,is secured to the frame A, which has pivoted thereon an arm, B, slottedat its It should. .be

upper end for attachment thereto of the pitmotion to the pitman z" tofeed the saw-blade downward at each end-of the stroke.

It will be noticed that the boxes S are stationary at all times in thesashes 0, said boxes being connected thereto. by transverse braces w, asshown in Fig. 3, and the screw-sleeve B,

which fits loosely over the smooth end of the feed-screw G, is turned bymeans of the arms p, which are connected to the mechanism hereinbeforedescribed, and the screw-threads on the sleeve, engaging with theinterior screwthreads on the boxes S, will cause the feedscrew to beraised or lowered as desired.

Having now fully described my invention, what I claim as new, and desireto secure by Letters Patent, is

1. In a machine for sawing stone, the sashes 0, provided with guides k,in combination with a the saw-bladeD and carriers E,having notches onlugs and rollers, and the feed-screws G, ex-

' tending through the carriers, and mechanism,

substantially as described, for operating the screws to raise or lowerthe carriers, substantially as and for the purpose set forth.

2. In a machine for sawing stone, the combination, with the saw-bladecarriers provided with lugs or notches for receiving the ends of theblade and opening 0, having'transverse slots q, of the sectional boxesF, having transverse wings p, substantially as and for the purposedescribed.

3. In a machine for sawing stone, the combination, with the movablesashes C and sawblade D, connected to suitable carriers, of thefeed-screws G, screw-sleeves R, engaging with the interior screw-threadson stationary boxes S, and means for operating said sleeve,whereby thesaw is raised or lowered, substantially as and for the purpose setforth.4. In a machine for sawing stone, the shafts f 9, provided on theirinner end with gearwheelsc c, the former oneof the shafts connected to acrank onthe driving-shaft by means of the pitman 't', ratchet j, andpaw] h, and the former-mentioned shaft connected to the driving-shaft bymeans of belts and pulleys, in

combination with the shaft a, having aflat sided extremity, b,'and thegear-wheel k, provided with sleeves 0, adapted to slide thereon,

and operating as described, and the gear-" wheels at '0, pinions u, andgear-wheels I, and

suitable mechanism for operating the several shafts, whereby thefeed-screws are also oper ated', substantially as and for the purposespecified.

5. In a machine for sawing stone, the combination, with the inclinedguide blocks T U,

.wheel 0, engaging with the slot by means of pin 0', andsuitable'devices connected with the crank-wheel for operating thescrew-sleeves R, substantially as and for the purpose set forth. v

6. In a machine for sawing stone, the feedscrews G, screw-sleeves R, andstationary boxes S, in combination with arms P Q, crankwheel 0, andsuitable mechanism for operating said crank-wheel, substantially as andfor the purpose specified.

7. In a machine for sawing stone, the combination, with the crank-wheelO, of the stationary plate W, having inclined slot 1*, and inclinedextremities 8, whereby the saw is made to out both ways, or in bothdirections, substantially as and for the purpose specified.

8. In a machine for sawingstone, the shaft f, connected with suitablegearing for operating theshaft a, and the pitman i, in combination withthe pivoted arm B, spring a, and cam-wheel A, the latter being connectedto the extremity of the shaft h, substantially as and for the purposeset forth.

9. In a machine for sawing stone, the movable sashes O, saw-blade D, andcarriers E, to which they are connected, in combination with thefeed-screw G, provided at their upper end with gear-wheels I,screw-sleeves R, and boxes S,-in closing the sleeves, and the pinionsand gear-wheels u o w, the latter being connected 'to the ends of theshaft a, and means for operating said shafts, substantially as and forthe purpose set forth.

10. In a machine for sawing stone, the sashes C,prov ided with suitableguides,k, and having connected thereto stationary screw-boxes S, in

' combination with the feed-screws G, screwsleeves R, carriers E,provided with wheels J, and the wheels or rollers 6, supported on tracksf, secured to the frame of the machine, substantially as and for thepurpose set forth.

11. In a machine for sawing stone, the crankwheel 0, an inclined slottedplate, \V, in com- 'bination with the pivoted arm B, spring u, andcam-wheel A, and suitable intermediate connections for operating theshaft (1, and the sleeves R, substantially as and for the purpose setforth.

In testimony that I claim the above I have hereunto subscribed my namein the presence of two witnesses.

Y THADDEUS A. JACKSON.

Witnesses:

L. L. MILLER, M. P. CALLAN.

